The new cranking Mp3 player from Thanko is powered by a hand crank. You turn the handle and it gives you 10 minutes of playing time for every minute of crank action. The player holds 1 GB of music and it also has a build in LED flashlight. All powered by your own muscles. The ideal companion for backpacking or going off the grid (assuming you like to listen to the same 1GB of music over and over again!).
available at geekstuff4u via Akihabara
Useless Box Kit - The Original Useless Box Kit, Also Known As the Useless Machine or Perpetual Machine, A Perfect fit for Geek Gifts Desk Toys or a Cool Gadgets Gift